Pump jack



April 14, 1931. T, J. STEBBlNS 1,800,232

' PUMP JACK Filed Sept. 4. 1928 3 Sheets-Sheet l April 14, 1931. A T, 1 STEBBlNS 1,800,232

PUMP JACK Filed Sept. 4, 1928 3 Sheets-Sheet 2 ZL/LLGSS; rbzOt/QL J-xff. 114,05;

April 14, 1931. r. .1. sTEBBlNs PUMP JACK Filed Sept. 4, 1928 3 Sheets-Sheet 25 Patented Apr. 14, 1931 UNITED STATES PATENT OFFICE TIMOTHY J'. STEBBINS, OF DAVENPORT, IOWA, ASSIGNOR TO RED JACKET MFG. CO., Ol'

` DAVENPORT, IOWA, A CORPORATION OF IOWA :PUMP JACK Application led September 4, 1928. Serial No. 303,750.

I 10 efficient, and durable, economical in construction, and in which the main operating part-s are practically self-lubricating so as to require a Yminimum amount of attention and repair.

:A 15 A further object of the invention is to provide the pump jack with means for interchangeable operation of the pump by means of windmill or manual pump handle, when desired.

n30 The invention may best be understood by reference to the accompanying drawings illustratino' one form in which it may be embodied.. tln the drawings,

. Figure 1 is a front face view ofthe pump i245 jack with portions of the upper guide members broken away and showing a fragmentary portion of a removable pump handle in operative position. i

` Figure2 is a side view of the device shown 'l 30 in Figure 1 with the operating parts in the crank case shown invertical section.

Figure 3 vis a detailed view of the front crank case with parts broken away to show details of the crank arm construction and '35 lubrication plug for said crank case.

Figure 4 is a perspective view of the crank arm.

Figure 5 is a perspective view of a shield plate utilized in connection with the crank 40 arm shown in Figure 4; and

Figure 6 is a rear perspective view of the link member carried on the crank arm.

Referring now to details of construction shown in the drawings, the main casing 10 i5 is made up of two side plates 11 and 12 fitted together along cooperating flanges 11a and suitably Secured as by bolts 13, 13 to make the casing substantially oil tight. The casing forms a housing for an enclosed gear 15 A. 56 fixed on shaft 16 having bearing at opposite ends in side plates 11 and 12 and preferably by means of anti-friction bearings 17 and 17 a carried in enlarged bearing supports 11b and 12b, respectively. In the form shown two anti-friction ball bearing members 17 17 are used in the front bearing support 11b and a single similar ball bearing member 17a is utilized in the rear bearing support 12b and is secured therein by means of a plug 16a threaded in the outer end of said bearing support, as shown.

The casing 10 is substantially cylindric to conform with the outline of the gear 15, excepting at the bottom where it is provided with a pair of supporting legs 19, 19 adapt ed for detachable engagement upon a supporting plate 20, and at the top where a driving shaft 18 has bearing on anti-friction members 21 and 21a-21a which may be of similar type to the ball bearing members 17 and 17a heretofore described, and supported in bearing supports 22 and 22a in the front and rear plates 11 and 12, respectively. The front bearing member 21 is held in place by a threaded plug 23, while the ball bearing members 21a-21a are retained by a plug 23a preferably removable endwise from bearing support 22a and normally held in place by a set screw 24.

A support 25 is formed on the upper end of the casing 10 and forms a base for a bracket 27 projecting forwardly beyond the front face of the casing. A pair of guide rods 26, 26 are arranged on the outer end of said bracket in spaced relation on opposite sides of the vertical plane including the axis of the main shaft 16, as clearly shown in Figure 1.

The operating parts of the device include a belt pulley 30 or its equivalent on the rear end of drive shaft 18, and a pinion 31 carried on said drive shaft within the casing meshed with gear 15. A crank arm 35 is keyed on the outer end of the shaft 16 and moves within an outwardly opening annular recess 36 formed in the front face plate 11. A pin 37 is carried on the end of the crank arm 35 and has a link member 38 connected thereto. This link member, as best shown in Figures 2 and 6, has a cup-shaped annular portion 39 with v a central hub 40 having bearing on the pin 37,

preferably by means of a pairof anti-friction bearing members 41, 41. Said bearing members are enclosed and held in position by means of a cap 41a secured to the end of pin 37 by a screw 415.

The arrangement lis such that the peripheral flange 39a of the cup member 39 is turned inwardly in close relation with the outer-faceof theside plate 11 and is of sufficient diameter to cover-the exposed end of shaft 16 and crank arm 35 in all positionsof rotation thereof.

The link member 38 is also pro-vided with a connecting piece 42 at one side thereof to which a pitman rod 43 is connected, as for instance, by detachable bolts 44a, 44a, as shown in Figure 2. Theupper end of the pitman rod 43 is pivotally connected as by a pin 44 to a reciprocable actuator or yoke member 45 having a pair of guide members 45a, 45a slidable along the vertical guide rods 26, v26. The yoke 45 is suitably connected tothe pi-tman of the pump for operating it, as for instance, by means of a rod 50 connected by pin 51a to the front end of yoke 45 and secured at its lower end to the pump rod 50 by va suitable coupling member 52. The pump rod 50 eX- ,Y tends downwardly through the pump head 53 which, in the form shown, is of the quick detachable type, suitably secured by lugs53a, 53a on the base plate 2O which also forms a support for vthe supporting legs 19, 19 of the Y pump jack, as heretofore described.

Referring again to the construction of the crank arm 35 andlink 38, it will be observed that 1 provide a shield plate 55 connected to and carried by the crank arm 35 so .as to close the recessed portion 36 in all positions of rotation of the link member 38, and arranged so that the front surface of said pla-te is substantially flush with the frontface of the casingplate 11, as lclearly shown in Figure 2.

rlhe means for mounting the plate 55 on the crank arm 35 is best illustrated in Figures 3, 4 and 5, rfrom which it will be seen a yseries `of projections56, 56 are formed on theV hub of the crank arm on the opposite end of the crank arm carrying pin ,37, and the plate 55 is attached to said y projections by suitable means, as screws :57, 57. The portion of the plate 55 adjacent the free end of the crank arm 37 is cut away, as shown, and said plate is of suliicient area to close the recessedarea 36 in all positions of the link 38, as heretofore described. Means are also provided for permitting lubrication of the crank case, as by means of a plug 59 preferably arranged in the upper end of the casing above the drive shaft 18, so

that when lubricant is put intoy the casing it thoroughly lubricates the bearings of shaft 18 together with the main bearings of the gear 15. A small -amountof lubricant also finds its way through the main bearings 17, 17so as to provide sufficient lubrication ofthe crank arm bearings 41, 41.

As a means for permitting operation of the pump independently of the pump jack, if desired, the pin 44 normally connecting the pitman 43 to yoke VVmember45 is removable from the latter at will, and when thus disconnected, a manual pump handle such as indicated at 60, may be pivotally attached by fulcrum link 61 to the outerv end of bracket 27 as clearly shown in Figure 1, and having its inner arm connected by pin 62 to the upper end of the pump rod 50. It will be understood, of course, that when not in use, the handle 60 and fulcrum link may be'removed.

Similarly, theyoke 45'1may be rdisconnected from rod`50 by removing pin 51a, and the rod 50 may then be attached for direct operation by a windmill kby means well known inthe art.

Among the advantages ofthe construction.

hereinabove described, is the particularly compact arrangement wherein the axisof the `crank shaft intersects the aXis ofthe pump rod, which Y gives a direct application of power, with a minimum amount ofangularity of the link member 3,8v as well asan equal angularity of said link member on opposite sides of the axis of the crank shaft. This is particularly advantageous in double act.-

ng pumps, since it gives equal powerfduring bothup and down strokes; Furthermore,it permits the pump to be operated in either direction, which is generally not practicable in most styles of power headswhere the .crank shaft is offset horizontallyv from the/vertical;

pump rod.

A further advantage is the 'particularlyV compact and eflicient arrangement whereby the pump rod is in close relationship ,to the end ofthe crank arm'and the connecting link,

longitudinally of the `axis of the crankshaft. Furthermore', the gear case isrecessed for the crank arm, and the crank arm in turn mov- .able within part of the link member, all of which adds to the compactness and .efficiency of operation .of the device, reducing the roverhang inthe upper guide bracket27 and -bringing the pump rod as close as possible to the end of the crank shaft.v A

I claimV as my invention:

1. In a power head, a casing, gearing in said casing including driving and drivenl annular recess to close the lattersubstantially l ush with the side of said casing at the eX- posed side of said link.

2. In a poWer head, a casing, gearing in said casing including driving and driven shafts, said casing having an annular recess at one side thereof concentric with said driven shaft, a crank arm on said driven shaft outside of said casing and partially housed in said recess, a reciprocable actuator, and a link connecting said crank arm with said actuator having an annular ianged portion turned n- Wardly toward the adjacent side of said casing and enclosing said crank arm in all positions of rotation thereof. Signed at Davenport, Ia., this 27th day of August 1928.

TIMOTHY J. STEBBINS. 

